Wall set.



PATENIBD AUG. 14, 1906.

J. A. BIRS PIELD. WALL SET.

APPLICATION FILED FEB- 13. 1905.

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PATENTED AUG. 14, 1906 2 SH EETSSHEET 2.

VE ISL-1 Jules A131? J. A. BIRSFIELD. WALL SET. APPLICATION FILED FEB. 13. 1905.

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JULES A. BIRSFIELD, OF ROOHESTE R, NEW YORK, ASSIGNOR TO STROM- BERG-OARLSON TELEPHONE MANUFACTURING COMPANY, OF ROCH- ESTER, NEW YORK, A CORPORATION OF NEWV YORK.

WALL SET.

' Rochester, in the county of Monroe and State of New York, have invented a certain new and useful Improvement in Wall Sets, of which the following is a full, clear, concise, and exact description, reference being had to the ac- ,companying drawings, forming a part of this specification.

My invention relates to telephone wallbox sets; and its object is to provide a wallbox constructed wholly of metal in which all of the parts are accessible for repairs and readily removed from the box without requiring the removal of the wall sets from the wall on which it is secured.

. In the accompanying drawings I have illustrated a wall-box which may be formed of metal stampings or of thin metal castings. I have also shown an improved arrangement of the parts therein, the condenser only being secured in the base of the box and readily removable without removing the base from the to secure lightness.

v v elevation of the base alone.

wall, while the other telephonic apparatus is secured in and on the cover, being thus very readily accessible to inspection and repairs,

In the drawings, Figure 1 is the front elevation view of the wall-box. Fig. 2 is a side elevation view thereof. Fig. 3 is a rear elevation view of the cover detached from the base, showing the arrangement and connection of the telephonic apparatus. Fig. 4 is a front Fig. 5 .is a vertical sectional view of the base, taken on line 5 5 of Fig. 4. Fig. 6 is a detailed detached view of hinging means employed, and Fig. 7 is a sectional view taken on line 7 7 of Fig. 6.

Like reference characters refer to like parts in various figures.

The base of the wall-box may be stamped fromsheet material in the form of a rectangular frame 1, the rear of which may be open This base serves merely for the support of the condenser, and a supporting projection 2 extends rearwardly and upwardly from either side of the lower wall 3 of the base. A similar projection 4 extends rearwardly and downwardly from the upper wall 5 of the base. The condenser is thus Specification of Letters Patent.

Patented Aug. 14, 1906.

' Application filed February 13, 1905. Serial No. 245,528.

supported on the base 7 of the lower projections and rests against the vertical portions 8 and 9, respectively, of the lower and upper projection, the condenser thus forming the rear wall of the base. To secure the condenser in position, projections 10 extend upwardly from the front edge of the lower wall and disposed before the condenser, while before the upper edge of the condenser a small plate 11 is secured to the upper wall 5 by means of a screw 12. To insert the condenser, the lower edge thereof is placed between the vertical walls 8 and the projec tions 10 and is then swung rearwardly against the vertical wall 9 of the upper projection, the plate 11 being then secured in pos tion, and the condenser is thus locked to the base and at all times may be readily removed therefrom without removal of the base from the supporting-wall. The receiver-hook and switch mechanism are mounted on a block 13 secured'to the side wall 14 of the cover 15 by means of screws 16. The receiver-hook 17 extends through an opening 18 in the wall 14 and may be surrounded by an escutcheonplate 19. The receiver-hook is pivoted at 20 and provided with an actuating-button 21, adapted for actuating the switch mechanism 22 as the receiver 23 engages or is disengaged from the hook. The cord 24 from the receiver passes through an opening 25 in the wall 14, and the various conductors thereof connect with terminals 26, mounted on the terminal block 27, which is secured to the lower wall 28 of the cover by means of screws 29. The opening 25 may be provided with an insulating-bushing 30. The induction-coil 31 is supported from the ter== minal block 27, screws 32 passing through the terminal block and engaging the end plates 33 of the induction-coil.

From the front of the cover extends the transmitter 34, connected with the cover by provided with a depression concave chamber 36.

To the top wall 37 of the cover ringer mechanism is. secured. The electromagnet 38 of this ringer mechanism is secured by means of screws 39, passing through the wall 37 and engaging studs 40, secured to the yoke-piece 41. Studs 42, secured to the ends of the yoke by screws43, extend upwardly through openings 44 in the wall 37 and at their outer ends support bells 45, secured thereto by means of thumb-screws 46. Hammer ;47 t of the bell also extends vupwardly through the wall 37 between the bells 45.

The rear edge of the side wall 47- has hin ed members 48, which upon application of 't e cover to the'base pass through openingsl49 in the side wall 5.0 of the base, as best shown-in Figs. 6 and 7. The hinge-pins 51 pass through the hinged members 48 and rest againstthe inner side of the wall '50. :To' lock the pins inposition, clamping spring-frames 52 are provided. The body portion 53 of these spring-clamps is SGCUI'QdlZOflDhG wall 50 screws 54, .while the spring ends 55 thereof enga e the corresponding hinge-pin at either si e of the members 48 and press the hinge-pins against the wall 50, thus securing them in position. To bodily remove the cover from the :base, it is only necessary to loosen the screws 54, whereupon the pins may be drawn from the members 48 and the cover removed.

' I also provide a "lock for locking the cover to tl le base. This lock is in the form of a screw 56, passing through the wall 14 of the cover for engagement .with the threaded opening 57 in the lug 58, extending from the corresponding base-wall. A leaf-spring 59 engages under the head of the screw and against the wall 14, tending to withdraw the screw. The action of this spring, however, is limited by a collar 60, secured to the screw at the other side of the wall 14. The locking s crew is thus prevented from falling from the cover, and the combined action of the spring and collar hold the screw at all times a line with the threaded opening 57 the spring also serving to prevent the screwthreads from striking the threads of the opening as the cover is closed, thereby preventing injury'to the threads. To lock the door upon closure thereof, the screw-driver, engaging the screw, is pushed inwardly, and

. upon turnin thereof the screw will catch the threads, an the cover will be locked to the supporting-base.

'I thus provide a very light and at the same time very durable wall-box frame in which the various apparatus are arranged to be readily accessible and removable forinspection or repairs and without necessitating the removal of the wall-box from the wall, to

- which it is secured. I do not wish, however, to be limited to the exact construction of:'the

box and the arrangement of the parts theresaid condenser in said supporting projection-s,

said condenser forming th'e rear=wall of the base-frame. a

2. In a-telephone wall-box, the combination with a .rectangular supporting 'base shaped intervally from sheet materia'l, cf "a cover for said base, a condenserin-saidbaseframe, shelves integral with said frame extending 'rearwardly and upwardly from the lower part thereof for 'receiving and supp orting the lowerend of the condenser, a projection integral with the frame material extending inwardly and downwardly from the epper part thereof to receive and support the upper part of the condenser, projections extending upwardlyfrom the lower wall of the base-frame for locking the lower part of the condenser in position, and a removable extension from the upper part of the lease frame locldng th'e 'upper part of the con denser in position, said condenser forming the rear wall of said base-frame.

3. In a telephone wall-box, the combination with a base for engaging a supportingwall, of a cover for said base, said base bein in the form of a rectangular band of sheet material, shelves extending from the lower wall of the base for supporting and retaining the lower end of a condenser to be contained in said base-frame, projections from the upper wall of the base-frame for receiving the upper end of the condenser, projections from the lower wall of the base-frame for locking the condenser to the shelves, said rectangular band, said shelves and said projections being stamped integrally from sheet material, and a removable projection engaging the upper wall of the frame for retaining the condenser in the upper projection.

4. In a telephone wal l-boxI, the c'omloina tion with a base frame for engaging a supporting-wall, ot a cover for the base-frame, said base-frame being in. theshapeof a rec'- tangular' shell of sheet material, a condenser contained insaid base, shelvesextendingrea'rwardly and upwardly-from the lower wall-of the-rectangular shell for receiving the con- IIO 4 base-frame, hinge members on said cover exdenser, projections extending upwardly from the lower wall of the rectangularband and dis posed before the lower end of the condenser, a projection from the upper wall of the shell extending inwardly and downwardly for receiving the upper end of the condenser, said shelves and projections being stamped integrally with the rectangular shell, and a removable projection engaging the upper wall of the base and extending downwardly to lock said condenser within said baseframe, said condenser forming the rear wall of said baseframe.

5. In a telephone wall-box, the combination with a base-frame for attachment to a supportingwall and for receiving a condenser, of a cover for said baseframe, said base frame being in the form of a shallow rectangular casing, means for inserting or removing the condenser from the front of the baseframe, means for locking said condenser in said base-frame, openings through a side wall of said casing, hinge members extendin from the cover-wall and passing through said openings, hinge-pins extending through said hinge members and disposed against the inner Wall of said casing, and clips for securing said pins in position.

6. In a telephone wall-box, the combination with a base-frame for attachment to a supporting-wall, of a cover for said baseframe, said base-frame being in the form of a shallow rectangular casing and adapted for the reception of a condenser only, means for inserting and withdrawing said condenser from the front of the casing, means for locking said condenser in said casing, openings through a side wall of said casing, hinge mem bers extending from the corresponding wall of the cover and into said openings, hingepins passing through said hinge members and disposed against the inner side of the casing-wall when the cover is in position, and clips secured to the casing-wall and engaging the hinge-pins at either side of the hinge members for securing said pins in position.

7. In a telephone wall-box, the combination with a base-frame for attachment to a supporting-wall, of a cover for said baseframe, openings through a side wall of said tending through said openings, hinge-pins having separable engagements with said hinge members and disposed against the inner side of the supporting base-wall whenthe cover is in position, and clips secured to the base-wall and holding said hinge-pins in position.

8. In a telephone wall-box, the combination with a supporting-base frame for attachment to a supporting-wall, said supportingbase being in the form of a rectangular shell adapted for the reception of a condenser only,

engaging the hinge-pins for a cover for said base-fr ame, openings through a side wall of said casing, hinge members extending from thecorresponding wall of said, cover and passing through said openings,

hinge-pins for separable engagement in sa1d hinge members, said hinge-pins being disposed against the inner side of the casingwall when the cover is in position, c ips secured to the casing-wall and engaging the hingepins at either side of the corresponding hinge member for normally securing said pins in position, and screws for securing said clips to said casing-wall, loosening of said screws allowing withdrawal of the hinge-pins whereby the cover may be readily removed from the base-frame.

9. In a telephone wall-box, the combination with a supporting-base for attachment to a supporting-wall, said base being in the form of a rectangular casing adapted for the reception of a condenser only, means for allowing said condenser to be inserted and removed from the front of the base, a cover for said base, a transmitter extending from the front wall of said cover, a receiver-hook extending from the exterior through an opening in said side wall for engagement with said mounting-block, switch mechanism secured to said mounting-block for actuation by said switch-hook, an electromagnet mechanism Within said cover secured to the upper wall thereof, bells for actuation by said electromagnet mechanism disposed. at the outside of said top wall, a terminal block secured within the cover to the lower wall thereof, and an induction-coil resting on the lower wall of the cover at the interior thereof secured' to said terminal block, said cover and base being each formed integrally of thin metal.

10. In a telephone wall-box, the combination with a base for attachment to a supporting-frame, said base being in the form of a thin rectangular shell of metal and adapted for the reception of a condenser only, means allowing said condenser to be removed and inserted from the front of the base, a cover for said base formed integrally of thin metal, openings through a side wall of said base, hinge members extending from the corresponding wall of the cover and passing through said openings, hinge-pins passing through said hinge members and disposed against the inner side of the base-wall, clips secured to the base-wall and engaging the hinge-pins to hold said pins in position against said base-wall, a lug extending from the opposite side wall of the base and having a threaded opening, a screw passing through the corresponding cover-wall for engaging said threaded opening, a spring interposed between the screwhead and the cover, and a collarsecured to the screw at the inside of the cover.

11. In a telephone wall-box, the combinaa "to one wall of said base, a lug extending from 10 resting against the cover, and a collar 60 setion-"with a base in the form of a shallow reccured to the screw at the inside of the cover, tangular metallic casing adapted for the resaid cover being also formedof thin metal. ception of a condenser only, of a cover hinged l In Witness whereof I hereunto subscribe my name this 9th day of February, A. D. the opposite wall of said-base andprovided 1905. l v With a threaded opening, a screw passing .v JULES A BIRSFIELD through the correspondin wall of the cover l a for engaging said threade opening, a jsprin Witnesses: t 59 engaging under the head of the screw an CHARLES J. SCHMIDT,

LEONARD W. NOVANDER. 

